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T A K I N G   M E A S U R E M E N T S  

5

 

How to Measure Resistance

 

To use the DMM for resistance measurements, connect the resistor to the terminals labeled 

HI 

(V 

Ω)

and 

LO

, select the resistance measurement function by pushing the 

[

]

 button on the 

front panel as shown below in Figure 6.  

 

Then connect the leads of the probes to the circuit in 
parallel with the resistance in question (Figure 7).   

 

 

How to Measure Frequency 

To use the DMM for frequency measurements, connect to the terminals labeled 

HI (V 

Ω)

and 

LO

.  Select the frequency measurement function by pushing the 

Freq

 button on the front 

panel as shown below in Figure 8.  The meter is connected in parallel the same as taking a 

resistance measurement (Figure 7).  

Figure 6

. How to Measure Resistance 

Figure 7

. Probe/Meter Placement to 

Measure Resistance Across Resistor R 

Hi 

 

DMM 

Lo 

FUNCTION 

MATH  

DISPLAY 

DC I 

AC I 

 4W

Period

dB 

dBm 

DC V 

AC V 

 2W

Freq 

Cont 

Null 

Min/Ma

HI 

HI 

LO 

LO 

 

4W

 

Shif

Select for Frequency 
Measurements 

Frequency 

Figure 8

. How to Measure Frequency 

FUNCTION 

MATH  

DISPLAY 

DC I 

AC I 

 4W 

Period

dB 

dBm 

DC V 

AC V 

 2W

 

Freq 

Cont 

Null 

Min/Max 

HI 

HI 

LO 

LO 

 

4W Sense

Shift 

Select for Resistive measurements

Summary of Contents for HP34401A

Page 1: ...GEORGIA INSTITUTE OF TECHNOLOGY User s Guide HP34401A Digital Multimeter Brian Brown ...

Page 2: ...T I O N 1 Setting Up the HP34401A 2 Overview of the Controls 2 S E C T I O N 2 How To Measure DC AC Voltage 3 How To Measure DC AC Current 4 How To Measure Resistance 5 How To Measure Frequency 5 S E C T I O N 3 Trouble Shooting 6 Where to Find More Help 6 References 6 ...

Page 3: ...elp section Features he HP34401A is setup for bench top use with AC power supply It performs at 1000 readings sec and has a 6 digit display The HP34401Awillautomaticallyadjustthe range to the characteristic being measured It is also extremely accurate 0 0015 error for DC 0 06 for AC Specifications Function Range For accuracy specifications consult the full manual DC Characteristics DC Voltage Rang...

Page 4: ...er this is complete the HP34401A is ready to perform measurements Overview of Controls The front panel has two rows of keys for selecting the functions The right side of the panel contains various probe input locations of which the selection is dependent upon the characteristic being measure Figure 1 The selection keys are annotated in black and blue To select a function in blue first select the b...

Page 5: ...onnect the leads of the probes to the circuit in parallel with the location of the voltage in question Figure 3 The Hi lead connects to the pos part of the circuit and the Lo to the neg If these are reversed a negative value for the voltage is obtained CAUTION Do not exceed the maximum allowable voltage input 1000V DC Also never apply a voltage over the current input terminal I of the DMM Section ...

Page 6: ...ls Figure 4 To measure the current either the DC I or AC I keymustbe selected by pushing SHIFT and DC V or AC V button Next connect the leads of the probes to the circuit in series with the location of the current in question Figure 5 The current I lead connects to the pos part of the circuit and the Lo to the neg If these are reversed a negative value for the current is obtained CAUTION Do not ex...

Page 7: ... VΩ and LO Select the frequency measurement function by pushing the Freq button on the front panel as shown below in Figure 8 The meter is connected in parallel the same as taking a resistance measurement Figure 7 Figure 6 How to Measure Resistance Figure 7 Probe Meter Placement to Measure Resistance Across Resistor R Hi Ω DMM Lo FUNCTION MATH DISPLAY DC I AC I Ω 4W Period dB dBm DC V AC V Ω 2W Fr...

Page 8: ...in the probe input panel to left of the current I input The probe inputs are correct but when the meter is connected to the circuit the meter reads invalid values or does not read at all Check that the meter is connected to the circuit in the correct orientation It must be connected in series for current readings and in parallel for voltage frequency and resistance Check back in the Making Measure...

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